Quick Release Hook Quality

Our Quality Assurance for Highest Standards

Worldwide Manufacturer
International Quality Standards
Team Experience
FAT Tested

Design Factors

Designed for Ultimate Performance

When your marine facility is equipped with well-designed equipment that’s designed not simply to do a job, but optimize performance and maximize profitability, it makes a measurable improvement to operations.

Properly installed and operated, high-performance equipment improves safety, reduces risk, and minimizes unnecessary downtime – all supporting operational efficiency and profitability. By choosing Glen’s industry-leading Quick Release Hook product lines, you can support your operational goals

Delivering Quality and Safety

From our advanced manufacturing facility in Chongqing, Glen’s in-house design and engineering teams have used their extensive industry experience to create Quick Release Hook products of quality, performance, and cost that performs ahead of the competition.

Our expertise has enabled us to keep improving the design of our products, and by introducing extra components to our Quick Release Hook our customers continue to receive the best possible product for their operations. The efficiency of our in-house design and manufacturing processes enables us to use high-quality materials and components, without sacrificing the competitiveness our customers demand.

That’s why we believe Glen provides the best marine safety equipment solution for our worldwide customer base.

Your Benefits in a Glimpse

Less Downtime
Disassembled parts



The whole hook body can be disassembled by ordinary hand tools, it can shorten the downtime and ensure a faster process during regular maintenance

Locking Mechanism

Locking Mechanism


For manual release type, to prevent the release handle from being moved accidently, and to avoid the hook being released unexpectedly, we attach the lock mechanism to manually lock the handle.

Spark Free

Spark-fee operation


No spark during the emergency release under extreme pull load, to ensure the safety in the hazardous area.

Meanwhile the block can be regular replaced to keep the function of the hook head.

Hand lever

Detachable hand lever


The hand lever is detachable, with standard operation process, the lever should only be attached to the release handle before release operation, and should be detached and hang in place.

It can avoid the accidencial release action during ship mooring.

One-Step reset

One-step Reset Operation


With our mechanism, after hook release, it can be reset with only one-step operation which makes it simple and quick to get the quick release hook prepared for new vessel mooring

Industry Guidelines & Standards for Quick Release Hooks

Industry Guidelines
JTS 169-2017 Technical Code for Auxiliary Facilities of Wharf
OCIMF MEG3 – Mooring Equipment Guidelines
Materials Specifications
QRH ComponentsMaterialsStandardsGrades
  • Hook Part
  • Tumble Piece
  • Pivot Block
High Strength Alloy steelGB/T 3077-2015: Alloy structure Steels35CrMo
  • Hook Frame
  • Foundation
  • Other Structral Parts
Low alloy structral steelGB/T 1591-2018 High strength low alloy structral steelsQ345B
  • Capstan Head
Spheroidal Graphite Cast IronGB/T 1348-2009: Spheroidal graphite iron castings (eqv ISO 1083:2004)QT450-10
  • Shafts & Pins
High Strength Alloy SteelGB/T 3077-2015: Alloy structure Steels42CrMo
Name Standards
Bolt GB/T 5782-2016:Hexagon head bolts (eqv ISO 4041:2011)
Nut GB/T 6170-2015:Hexagon nuts, style 1 (eqv ISO 4032:2012)
Washer GB/T 97.1-2002:Plain washers (eqv ISO 7089:2000)
Structure Design
Steel structures designGB 50017-2017:Stander for design of steel structures
Welding designAWS D1.1/D1.1M
WasherGB/T 97.1-2002:Plain washers (eqv ISO 7089:2000)
Coating Systems
Name Standards
Steel Surface Preparation ISO 8503-2012: Prepatarion of steel substrates before application of paints and releated products
Film Thickness ISO 12944-2017: Paints and varnishes-Corrosion protection of steel structures by protective paint systems
Film Thickness ISO 2808-2019: Paints and varnishes-Determination of film thickness
Electrical Equipment
Name Standards
Explosive Equipment GB 3836.1-2010:Explosive atmospheres Part 1:Equipment-General requirments (eqv IEC 60079-0)
Protection GB/T 4208-2017:Degrees of protection provided by enclosure (IP code) (eqv IEC 60529:2013)
Safety GB 19517-2009:National safety technical code for electric equipments
Cable GB/T 1276.1-2020 (eqv IEC 60502-1)
Installation GB 50169-2016: Code for construction and acceptance of grounding connection electric euipment installation engineering
Non-Destructive Testing
Ultrasonic Testing ISO 176404:2018
Magnectic Particle Testing ISO 23278:2015
Radiography testing ISO 5579:2013
Name Standards
Environmental Monitoring Systems WMO–NO.8:Guide to Meteorological Instruments & Methods of observation
Wireless Communication IEC 60945:Maritime navigation and radio communication equipment and systems – general requirements – Methods of testing and required test results
Satellate Navigation Systems IEC 61108:Maritime navigation and radio communication equipment and systems – global navigation satellite systems (gNss)

In Compliance With International Standards

INTMOOR mooring hooks are designed in compliance with international standards including:

  1. OCIMF: Mooring Equipment Guidelines
  2. BS6349-4: Code of Practice for design of fendering and mooring systems
  3. MOTEMS: Marine Oil Terminal Engineering and Maintenance Standards
  4. AS3990: Mechanical equipment steel work
  5. AS4100: Steel Structures

The selection of the engineering material used for various components has been conducted in light of the following criteria:

  1. Performance (Mechanical properties)
  2. Resistance to wear
  3. Resistance to corrosion
  4. Practical and compact design
  5. Sustainability
  6. Reliability in extreme temperatures

Material Selection

Frame (Side Plates) Carbon Steel ASTM A572 Grade 50 Equivalent to AS 3678 Grade 350
Hook Body, Main Pivot Block, Primary Release Block and Cross Shaft High Strength Alloy Steel to ASTM A148 Grade 115-95, Equivalent to AS 2074
Vertical Pin High Tensile Alloy Steel Grade SAE4140
Load Cells, Dummy Pins ASTM A276 431 Equivalent to AS 2837 431
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Manufacturing Process of Our Quick Release Hooks

Built With Professionalism and Pride

Glen’s manufacturing process for our Quick Release Hook products has been refined to an efficient, lean process which meets our stringent quality standards. Achieved through our combined decades of experience in marine design and engineering with the latest lean manufacturing techniques, customers can be assured that every Glen Quick Release Hooks is made to deliver performance and longevity.

Manufacturing of the Hook Body

Manufactured in our advanced facility in Chongqing, China, we carefully follow a multi-step process for manufacturing our hook bodies.

Firstly, our purchased metal parts are mechanically processed by blanking, turning, and drilling, followed by rigorous shot blasting of machined metal parts. This is followed by manual painting and drying the metal parts, a multi-stage process that includes coats of primer, a middle paint layer, and a topcoat layer.

Our paint process adjusts according to seasonal ambient temperatures: when temperatures are higher in spring, summer, and autumn the painted parts are dried naturally; when the temperature is lower in winter, the parts are gently heated to ensure correct paint adhesion.

The sprayed metal parts are then assembled for the finished product.

Manufacturing of the Hook Basement

The production process of the hook base has no mechanical machining technology, and the rest has a similar production process as the Quick Release Hook Body – the base is fabricated, machined, sandblasted and welded, before assembly for load testing. Once this has passed, the base is disassembled, painted, and the full QRH is assembled and packed for dispatch.

This dispatch isn’t the end of the journey. At Glen, our customer relationships are paramount, and we continue to support the whole life of the product through aftersales service.

Built to Perform, Built to Last

Glen’s expertise in the manufacturing of Quick Release Hook solutions means we understand all aspects of the design, engineering, and manufacturing of safe, reliable products for a jetty, quay, port, towing, and offshore use.

Our dedicated team is ready to direct with you to produce a tailored solution that meets the exacting performance and safety requirements. If you require more information about the specific of our manufacturing process, or to discuss your operational requirements, the Glen team is ready to help – contact us now

Manufacturing Process


Forged Steel Material




Sand Blasting


Basement Welding


Hook Assembly


Load Test


Hook Disassembly




Equipment Assembly


Packing & Delivery

Quick Release Hook Factory Acceptance Test (FAT)

Factory Acceptance Test (FAT) is our standard process that evaluates the equipment during and after the assembly process by verifying that it is built and operating in accordance with customer’s requirements and design specifications.

FAT can help our customers ensure that the components and controls are working properly according to the functionality of the Quick release hooks. All the testing procedures are performed at GLEN’s factory.

GLEN’s FAT process can be attended by our customers or internationally recognized third parties, to achieve independent proof of functionality, quality and integrity.

During the process, all important documents, such as manuals, drawings, piping and instrumentation diagrams (P&IDs) can be verified.

The test items typically include the following:

The production process of the hook base has no mechanical machining technology, and the rest has a similar production process as the Quick Release Hook Body – the base is fabricated, machined, sandblasted and welded, before assembly for load testing. Once this has passed, the base is disassembled, painted, and the full QRH is assembled and packed for dispatch.

This dispatch isn’t the end of the journey. At Glen, our customer relationships are paramount, and we continue to support the whole life of the product through aftersales service.

Non-Destructive Testing

Non-destructive testing (NDT) is performed after welding procedure is finished, in a scale of 100%, it ensures the welding job is completed under standing welding procedure and result meet international standards.

Load Test

Every single piece of quick release hook is tested to ensure the most important function of the product, by mainly two procedure:

  1. Proof load testing of each one assembled hook with 150% of its safe working load at 3 minutes in minimum.
  2. Release testing of each one assembled hook under 100% of its safe working load.

Coating Check

Our coating is processed with Hempel brand Paint in accordance with ISO 12944, C5M. The coating inspection is performed under witness of the customers or internationally recognized third party.

Our Clients


Quick Release Hook After-Sales Service & Support

It is widely recognized what actually really matters is the total cost of ownership, the costs are not just in the purchase of quick release hook equipment, but also in regular preventative maintenance which can reduce downtime,and improve productivity with risks under control.

A tailored service program gives you inside access to GLEN quick release hook experts and allows you to leverage our experience and product knowledge for your own benefit.

GLEN will work with you with a service solution including some or all of the following:

  • Programmed Maintenance and Inspection
  • Onsite Calibration
  • Refresher Training
  • Audit of Spare Parts Holdings
  • Remote Technical Support and Diagnostics
  • Comprehensive Reporting and Recommendations

Training Programs

Quick Release Hook Training Program

Our experienced engineer can manage to help train your operator. Training can be customized to your needs, whether at our factory or onsite.

The training mainly includes:

  • System general training
  • Operator training
  • Maintenance Training

Onsite Inspection Services

Quick Release Hook Inspection

Our experienced and knowledgeable Engineers are able to assist in assessing your installed GLEN quick release hook for:

  • General Qquipment Condition
  • Damage Inspections
  • Onsite Technical Advice
  • Maintenance Tips and Recommendations
  • Replacement and Upgrade Options for existing equipment – GLEN or others’

Technical Support

Quick Release Hook Technical Support

If you have any questions on the operation of your GLEN or even other’ mooring and docking products, please contact us. GLEN can provide both remote and onsite support options.


Quick Release Hook Warranty
All new GLEN quick release hooks are backed by an 12 month warranty from the day of shipment. For warranty extensions or details please talk to GLEN sales representative and they will be happy to discuss your needs. Spare and service warranty is valid for 12 months but extendable with certain charge.

Spare Parts and Tools

Quick Release Hook Spare Parts

Based on our experiences, GLEN is able to make recommendations or supply consumable, operation and capital spares parts and required tools across the long working life of the quick release hook, to help ensure maximum equipment availability and keep it running as long as possible.

Repair Services

Quick Release Hook Repair Services

We also offer a number of options to support and extend the life of your existing quick release hooks through factory repair and overhaul.

Services include:

  • QRH Hook Refurbishment and Testing
  • Capstan Motor / Gearbox Refurbishment and Testing
  • Load Cell Repairs and Overhaul
  • General Equipment Repairs

Upgrade Services

Quick Release Hook Upgrade-Services

The decision for ports to upgrade the quick release hook actually requires more than just a set of equipment. What more required is a deeper understanding of port operating parameters and the condition and functionality of existing mooring equipment.

Whether you’re upgrading quick release hooks which are worn out, superseded or adding functionality, GLEN is able to offer a solution to meet your operational needs and budget

The upgrades we can provide include but not only the following:

1) Adding Functionality to Existing Quick Release Hooks (QRH) and bases:

  • Load Monitoring
  • Remote Release
  • Capstans
  • Increase Operating Line Angles
  • Fitting Safety Keeper Bars


2) Replacing Obsolete or Worn Quick Release Hook Utilizing Existing Bases or Bolt Patterns

3) Replacing Bollards with Quick Release Hooks

4) Upgrading Obsolete Computer Software / Hardware

5) Upgrading or Replacing Environmental Monitoring Systems

6) Replacing Capstans With Tugger Winches

Quick Release Hook Resistant
Quick Release Hook International Standard
Quick Release Hook Temperature
Quick Release Hook Corrosion Resistant

Resistance to

Compliant with International Standards

Resistant to Extreme Temperatures

Resistant to

Quick Release Hooks

Your Safe Mooring Partner

Piping Systems

High Quality Pipeline Materials

Quick Release Hook Products

Quick Release Mooring Hook

The Quick release mooring hook is critical to ensure efficient mooring operations at jetties, quays, and ports, developed by Glen Engineering.

Quick Release Towing Hook

Manufactured for exceptional performance, Glen’s Quick Release Towing Hooks provides towing solutions for ships, tugboats, harbour, and more

Quick Release Offshore Hook

Floating Production Storage and Offloading (FPSO) units are used in offshore oil and gas production for hydrocarbon processing, and more.

Free Standing Capstan

Free standing capstans are designed and manufactured for safe and efficient handling of vessels, designed and manufactired by Glen Engineering.

Intmoor Central Monitoring Systems

Central Monitoring System (CMS)

Glen’s Engineering’s smart, flexible and easy to operate via PC, CMS software aggregates the berthing and mooring data.

Mooring Load Monitoring Systems

Our load monitoring system combines reliable, repeatable load cell measurements with software that is easily accessible.

Berthing Approach

Glen’s Berthing Approach System is a critical investment ensuring safe operation for berthing and quick release hook operation.

Environmental Monitoring System

Our Environmental Monitoring System is built around a weather station to provide common meteorological measurements, and more.

Quick Release Hooks by Glen Engineering
Overview of Our QRH Products